FARSI, Carla; WATLING, Neil. Trivial fixed point subalgebras of the rotation algebra. MATHEMATICA SCANDINAVICA, [S. l.], v. 72, p. 298–302, 1993. DOI: 10.7146/math.scand.a-12449. Disponível em: https://tidsskrift.dk/math/article/view/12449. Acesso em: 13 aug. 2026.